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- W1987207811 abstract "Abstract A composite well-screen has been developed for resistivity measurements using high permeability ‘terran’ fabric wrapped around plastic well-screen containing 1.5 mm slots. Laboratory and in situ tests indicate that this screen presents a relatively small impedance to the flow of water and electricity while excluding fines that may be present. Experiments with the well-screen were made in situ after emplacement in an unconsolidated, dense, fine coastal sand body. Results are presented of electrical resistivity measurements made through the well-screen, using a focussed resistivity tool, which indicate that changes in groundwater conductivity could be monitored as changes in formation resistivity. The groundwater inside the well-screen has been logged but suffers from the possibility of vertical mixing whereas measurements through the casing do not. The well-screen also offers the possibility of taking water samples in unconsolidated sediments using a simple, very low pressure, double packer system. The effect of the well-screen on the resistivity measurements was found to be small after comparison with a self-bored resistivity log where the sand has been in direct contact with the formation." @default.
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- W1987207811 date "1986-01-01" @default.
- W1987207811 modified "2023-09-27" @default.
- W1987207811 title "A technique for groundwater quality monitoring using resistivity measurements made through a modified plastic well-screen" @default.
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- W1987207811 doi "https://doi.org/10.1144/gsl.eng.1986.003.01.25" @default.
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